**** CubicPower OpenStack Study ****
def root_app_factory(loader, global_conf, **local_conf):
    if not CONF.enable_v1_api:
        del local_conf['/v1']
    if not CONF.enable_v2_api:
        del local_conf['/v2']
    return paste.urlmap.urlmap_factory(loader, global_conf, **local_conf)